Lock system



W. E. GOEHRING July 21, 1936,:

LOCK SYSTEM Filed Jan. 9, 1930' 2 Sheets-Sheet l f 23 AAAAAAAAA ATTOR N EY July 21, 1936. w. E. Gol-:HRING LOCK SYSTEM 2 Sheets-Sheet? Filed Jan. 9, 1950 /NVENTR ATTORNEY Patented July 21, 1936 LOCK SYSTEM William E. Goehring, Stamford, Conn., assignor to The Yale a Towne Manufacturing Company, Stamford, Conni- Application January 9, 1930, serial No. 419,652

41 Claims.

This invention relates to a bank lock protection system adapted for use in the average city bank where it is necessary to protect funds against hold-upsl and robberies. I

There have been numerous developments in the art of bank lock protection, but in the main, the entire view of the development of systems in this art, has been to devise some sort of means for sending in an alarm when a bank is attacked. Other objects have been the capture of the thief by means of traps and other trick devices, and in many systems the operation of some sort of barrier is utilized to prevent an attack on the bank teller or others of the bank personnel having control of funds.

For many years banks have been protected against attack at night, by time controlled mechanisms which are adapted to be set at night when the bank vaults are closed. so that the vaults may not be opened until the time mechanisms run for a predetermined period of time. Thus, when a bank is closed in the late afternoon, the timelocks are generally set for about 8:45 the following morning. When the time movements run down at 8:45 in the morning, the combination locks or other mechanisms may be operated and access had to the vaults. Because the entire bank protection system is put under the control of timelocking mechanism, it is impossible for a robber to go to the bankers home, place a gun against him, and compel him to go down to the bank and open up the safe structure. l Other systems of bank protection comprise burglar alarm devices which, upon the closing of a circuit through a protecting device, or. upon the breaking of a circuit through a4 screen or other device, actuate an alarm which operates for a denite period of time previously determined.

While these prior systems of bank lck protection are-eilective during the night time, they are of no avail during the day period when the bank is doingbusiness.` During the past thirty or forty years. electric 'burglar alarms have been highly developed,` and timelocks have been placed on practically all night vaults, but the day holdup man has flourished and has become bolder with each successful holdup. The. holdup man today studies for weeks the bank he is going to rob, he knows vevery detail of its geography and operation. At a given time, he enters the bank, commands the various tellers to hold up their hands, and takes the money away with him. For this type of robber, the usual alarm systems are in,- eiective, since even though the alarmmay be actuated. the bandit will be free to scoop up the money and run. Similarly, ordinary protection such as is possible by constantly locked combination locks, is ineffective, because the bandit will be prepared to order the teller or other individuals in the bank to make the funds accessible 5 to him. It is impossible to defeat the armed gunmany by means which remain under human control after the beginning of the holdup.

Applicant has conceived a system of timelock control adapted to prevent a successful holdl0 up! during the daytime, the protection being arranged to prevent access to the funds which the bandit is primarily anxious to obtain. By lhaving the protection arranged under timelock control, the system is taken out of human hands 15 entirely and is placed under the control of a me chanical movement which cannot be iniluenced or varied in the course of its action.

Applicant provides a sexies of locks which will control the opening and the closing of the various 2l guard gates, the various chests, and the various' 'currency drawers operated by the tellers in the bank. He intends that normally, during banking hours, each of these locks will be conditioned preferably by the closing of a circuit therethrough 25 so that access may be had to the funds in the various compartments, chests and drawers. There are provided throughout the bank, a series of push buttons, which,it operated, will preferably close a second circuit, which will in turn 30` open the circuits through the series of locks so that the locks will render inaccessible the compartments which they are intended to protect.

'I'he apparatus also contemplates the presence o1' a balanced protective circuit for controlling 35 the locks. This balanced protective circuit includes wires to be laid throughout the bank. Should the current through these wires vary, either by being increased in intensity, or by being `decreased in intensity, means are provided for 40 conditioning the individual lock circuits so that the locks will render inaccessible the compartments which they are intended to protect.

Therefore, it is quite easily seen that, should any of the wires be cut, or anything be done to upset the balanced circuit, it will be impossible to obtain accessto the vstructures guarded by the locks. Naturally, it is necessary to provide means for resetting the circuit through the locks, and it is necessary that such means be time controlled -and inaccessible to anyone. Otherwise, a holdup mancould hold up the bank, have everything locked up in it. but could then run to the'reset mechanism, operate it to reset the system. and render the locks operative again so that he could reach the funds. If the robber knows he must wait through a delayed time period, he will be discouraged and leave the bank. Therefore, the

re-establishment of the circuits through the individual locks is under time control.

In my invention, I prefer to start the running of the time period automatically upon the locking up of the bank structures, and in the particular form of the time controlled means used, a continuously running time shaft is therefore utilized. Also, the invention includes the extra. provision of a lock guarding access to the running time shaft. Naturally, the basic idea behind the time control feature of the invention resides in the supervision of the reset mechanism for the entire system by time controlled mechanism to set up a delayed time period once the locks are conditioned to prevent access to the structures. Y

It should be borne in mind, that applicants apparatus is especially intended to safeguard currency held within the bank. If, in applicants structure, an attack is. made upon a bank and a push button is pressed, or the closed balanced circuit is broken, it becomes impossible to open any of the locked structures. At the same time, it becomes impossible to tamper with the control device because of the time control exercised over that control device. It is, therefore, part and parcel of applicants invention, that once an attack is made upon the bank, the locked structures are all rendered inaccessible, and the control means are also rendered inaccessible, and regardless of whether or not any individual is authorized to adjust the apparatus, or has a key giving him access to the apparatus, he cannot tamper with it. In other words, upon an attack on the bank, in applicants device, all the locking structures and the various controls are taken away from human control and are put under the control of a time device so that it is absolutely impossible for anyone to operate the locks until after the expiration of a period of time.

For a comprehensive description of my system, I shall refer to the drawings, wherein Fig. 1 shows the system in diagrammatic form. Fig. 2 illustrates the control cabinet in which the control apparatus for my system is mounted. Fig. 3 illustrates the operation of the time mechanism and the control relay. Fig. 4 is a view of Fig. 3

along the lines 4 4' of Fig. 3.

Referring more particularly to the drawings, it will be first necessary to describe one of the individual locks comprising this system. It should be understood that there may be any number of these locks for controlling access to any number of structures, but in the drawings I have shown but two locks. Each individual lock will be designated by the letter A and comprises a bolt I0 which is spring pressed in an outward direction and may be retracted by a roll-back I I operable on the rear portion I2 of the bolt. An armature I3 of an electromagnet I4 is adapted to lie in a position where it will prevent the retraction of the bolt by the key or other operating mechanism. This magnet I4 is in an electric circuit and is connected to that circuit by wires I5 and I6.

A switch I1 for the circuit of magnet I4 is located within the lock and is adapted to be closed upon the partial or attempted retraction of the bolt I0 as shown. If the external portion of the circuit through wires I5 and I6 is closed, as is the case under normal operation of the system, then attempted retraction of the bolt will y tempted retraction of the bolt will beineifective to complete the closing of the circuit, so that it will be impossible to withdraw the bolt. This is the condition which is adapted to prevail in case of an emergency. The means for breaking the outside circuit will be described presently, but it should be understood that any other manner of preventing the retraction of the bolt or of temporarily disabling the lock in case of an emergency is quite suilicient as regards the general working of this system.

As one control element for my system, I use a balanced coil I8, which has a pointer I9 normally held midway between two contact points 20 and 2I by a balanced circuit designated in general as B. The balanced circuit is of the usual type well known in the art wherein the electricity traversing the circuit and the coil III is calibrated to such strength as to maintain the pointer I9 carried by the coil, in a normal central position. It is readily understood that if the current is decreased or increased, the coil I8 will be rotated and will move the pointer I9 into contact with one of the contact points 2I. This balanced circuit generally includes and is controlled by a series of resistance 22, 23, and 24, which may be located anywhere throughout the bank. In addition,

there is a variable resistance 25, an ammeter 26, 3

and a source of electric current 21. In general, my balanced relay is balanced to occupy a midposition between the two contacts 20 and 2|, when the electrical current is equal to .0035 amperes. It is of course understood that the balanced circuit may be set at any current value.

It will be further understood that if the circuit is broken, or if one of the resistances 22, 23 or 24 is partially or completely short-circuited, the current in the balanced relay will at once vary and the pointer I9 will make contact with either of the two contacts 20 or 2I. If this should happen, a circuit would immediately be closed through a battery 28 and an electro-magnet 29, which may be designated as a secondary relay. The closure of this secondary relay 29 will cause its armature 30 to make contact at point 3l and close a circuit through a second battery or other source of current 32. This circuit will traverse the wire 33, a group of electromagnets 34, 35, and 36, wired in parallel, and then back through wire 31, the switch 30, 3i, and the other side of the source of current 32. The electromagnets 34. 35, and 36 will be termed attack relays since they are actuated whenever there is an attack or emergency.

Referring to Figs. 1, 2, and 3, the over running clutches and time mechanism for controlling the contacts 4I, and for resetting them into a circuit establishing position, are more fully described, although they do not form an integral part of my invention. A usual type of time mechanism B0 is employed having the usual gear and spring mechanism which may be wound by an arbor 6I through an opening 62. The gear train then operates continuously so as to tend to rotate the shaft 42 in the direction illustrated by the arrow 43 in Fig. 1. This drive is maintained through the pressure of the springs 63, the push rods s4, and the ban bearings ss, and tends to maintain the contact plate 4| in its position illustrated in Fig. 4. Upon excitation of the electromagnet 36, the armature 35 is moved in a counter clockwise direction as viewed in Fig. 4, and-against lthe force of the clock mechanism so as toopen the circuit through contacts 46and 46 and close the circuit through contacts 50 and 6|. Immediately thereafter the time mechanism will start returning the contact plate A4| to its initial position'of Figs. 1 and 4, and the circuit will be reestablished.

When contacts 4| are in the position shown in Figs 1 and 4, Athe external circuit for each individual lock of the system will be completed -from wire I6 through magnet I4 'to switch |1.

` devices, it should be understood that one is to the individual magnets 34, 35, and 36.

theoretically sulcient.

From this explanation of the circuit it is clear that with the elements31, 40 and 4| in the position of Figs. 1 and 4,'the external circuit through the magnets I4 of each lock in the system is completed and each of the bolts may be withdrawn by the key or other operating device.

In case the balanced circuit B should be disturbed by s'ome emergency, the electro-magnet or secondary relay 29 will close the switch 30, 3|, This will cause armatures 31, 38, and 39 of those magnets to rotate the shafts 42 in a counter-clockwise direction as opposed to the arrow 43, and will bring the contact members 4| opposite the contact members 50 and 5|. When this is4 done, the following circuits will be completed. K

From the wire 49 through the wires 46, 46', contact'4l, the contact 50 through the annunciator 52 and back to the other side |6`of the main line.

A second circuit will be completed simultaneously through the contact the electric light 53 and then back to the electric source through wire i6. The annunciator 52 and the light 53 are in parallel and are operable by the two contacts 50 and 5|. It should be understood that any other type of signal devices may be actuated by the movement of the shaft 42 and the plate 40. I

The circuit through the attack relays 34, 35', and 36 may also be established without disturbing the balanced relay. A group of push buttons C may be distributed freely throughout the banks. Closing of any one of these will close the circuit through the attack relays by shunting around switch 30, 3|. The established circuit will be through switch C, battery 32. the attack relays and wire 31.

With the circuit established through' the attack relays 34, 35, 36, the external circuit through the magnets I4 of the individual locks is broken at the contact points 4|, 45, 46. This will make it impossible to withdraw the individual bolts I0 and will render every lock in the bank inoperable. 0f course, the shaft .42 will now be iniluenced by the continuously running time controlled friction clutch and after a definite designated period, will return the discs 40 and contacts 4| to the original position shown in Fig. 1 so that the circuit will be once more completed through the individual locks ytrical control to lock and unlock a particular magnets 34, 35, and 36. the secondary relay 30, and the time control elements for actuating the shaft 42 are all located in a separate control cabinet D. 'I'his control cabinet in turn is controlled by a locking device similar to that shown in the 5 Fig. 1 and designated as A". Thus, when the entire circuit through the other locks is destroyed. the circuit is destroyed through the particular lock which governs access to the central control device. This makes it impossible for any manual manipul0 lation when the system is disturbed bythe occurrence of an emergency. Any type of time control for reestablishing the system or for permittingreestablishment may be used, but the means shown are preferred. l5

'Ihe entire system has now been described from an operating viewpoint. From the bankers viewpoint the system operates as follows: The series oi' locks A are continuously operable by key or other operating means. The entrance of a burglar or hold-up man through some barrier will automatically short circuit one of the resistances 22, 23, and 24, and thus render all the locks inoperative by the functioning of the various circuits and relays and access to any of the lock protected structures becomes impossible. Similarly, if an officer `or guard observesa suspicious character, a simple closing of the nearest switch button C also renders all locks inoperable. Once the-locks are rendered inoperable, the time controlled shafts 4230 will act to reestablish the lock circuits and put all of the locks into operative condition upon the expiration of a definite interval of time. During that time, it will be impossible to manipulate the system since all the control devices are maintained out of reach by one of the disabled locks.

While I have shown a particular means for controlling the individual locks and for operating the central lock control, it should be understood that many modifications of the same will readily occur to one skilled in the art. Furthermore. while I have described a particular lock, it should be understood that it is possible to use many other types of locking mechanism operating under elec- 45 structure. I, therefore, expect to claim my invention in a broad and sweeping manner, using the general term lock as indicating any locking mechanism, in order to obviate using the great number of claims which would be necessary were I to claim the variations of my invention necessitated by the use of various peculiar and assorted locking mechanisms. In addition, it should be understood that whereas the claims generally specify a series of locks, a single lock may be used in a small system without varying the mode of operation of my invention or evading its scope as indicated in such claims.

I claim: 6o

1. A lock having a controlling electromagnet,

a circuit for said magnet, a switch for said circuit located remotely relatively to the lock assembly and normally held closed, a switch for said circuit located adjacent said lock assembly and normally held open, the condition of said circuit determining the control exercised by said controlling magnet, an attack circuit, means whereby a particular conditioning of said attack circuit opens said first switch, and means for preventing unauthor- 7G ized closing of said rst switch thereafter.

2. In a lock system, a series of locks, said locks having an electrical circuit and means within said locks controlled by said circuit, an electric circuit external of said locks for controlling said 75 rst circuit, time controlled means also adapted to control said first circuit, the means controlled by said first circuit being adapted to render said lock operable or inoperable depending upon the control exercised by said .f :cond circuit and time means.

3. In a lock system, a series of locks, said locks being normally operative, electrically controlled means for rendering said locks inoperative, and time controlled mechanism for rendering said locks operative after a definite period of inoperativeness.

4. A lock having a bolt, an electromagnet for controlling the operation of said bolt, an electrical circuit for said electromagnet having a pair of switches, an attack circuit, a time lock, one of said switches having a dual control comprising said attack circuit magnet and said time lock, the other of said switches being manually operable.

5. In a lock system, a series of locks normally maintained operable, an electrical circuit having control means for rendering said locks inoperable, and time controlled means adapted to condition said electrical circuit to render said locks operable.

6. In a lock system, a series of locks normally `maintained operable, an electrical circuit in each of said locks having means for controlling the operativeness of said locks, a balanced electrical circuit adapted to condition said lock circuits to render said locks inoperative, and time controlled means adapted to condition said lock circuits to render said locks operative when they have been rendered inoperative. v

'1. In a lock system, a series of locks, an electrical circuit through each of said locks, means whereby the condition of said circuit is adapted to control the operation of said locks, a balanced circuit for controlling the condition of each of said circuits, and time controlled mechanism for controlling the condition of said circuits reversely to the control exercised by said balanced circuit.

8. In a lock system, a series of locks, an electrical circuit for said series of locks, a central switch for said entire circuit and a separate switch for each lock, a second circuit having a relay for controlling said central switch, and a time controlled mechanism also adapted to control said second switch.

9. In a lock system, the combination with a series of locking bolts, of a series of lock controlling magnets, one for each bolt, means controlled from a common point for maintaining an electrical circuit through all the magnets simultaneously, means located near each magnet for additionally controlling it, and additional means at said common point for breaking said electrical circuit.

10. In a lock system, a series of locking devices, an electromagnet in each of said devices for controlling the operation thereof, an electrical circuit for said magnets having a switch, an attack circuit, time controlled mechanism, means whereby said switch is movable to one of its positions by said attack circuit relay and is movable into its other position by said time controlled mechanism, a housing for said attack circuit relay and time controlled mechanism, and a lock for said housing constituting one of said series of locks.

11. In a lock system, a series of locks, each of said locks having a bolt and means for preventing the retraction of said bolt, an electromagnet in each of said locks operable to render said means inoperable, an electric circuit for said magnet, a switch for said circuit, an attack circuit having a relay, a time controlled device, said switch being movable to one or the other of its positions by said attack circuit relay and time controlled device, a housing for said attack circuit relay and time controlled device, and a lock for said housing constituting one of said series oi locks. 5

12. In a lock system, a series of locks, each oi said locks having a bolt and means for retracting said bolt, an electromagnet in each of said locks for controlling the operation oi said bolt retracting means, an electric circuit for said magnet 10 having a switch located outside of said lock, means whereby said switch is actuable into one or the other of its positions by an attack circuit relay and a time controlled mechanism, a housing for said attack circuit relay and time controlled l5 mechanism, a lock for said housing constituting one of said series of locks, said switch being operable to condition the electro-magnetic circuit to render said bolt retracting means operative.

13. In a lock system, a series of locks, each of 20 said locks having a bolt and operating mechanism therefor, an electromagnet in each of said locks for controlling said operating mechanism, an electric circuit for said magnet, parts of said circuit being internally and externally positioned rela- 25 tively to each of said locks, a switch located in the external portion of said circuit, an attack circuit and a time controlled device, means whereby said switch is actuable into one or the other of its positions by said attack circuit relay and said 30 time controlled mechanism, a housing for said attack circuit relay and time controlled mechanism, a lock for said housing constituting one of said series of locks, a switch for each lock oi said series located in the internal part of the circuit, 35 said internal and external switches being related so that predetermined positions of each will condition the electromagnetic circuit to render said bolt operating means operative.

' 14. In a lock system, a series of locks, each 40 lock having a bolt and means for operating the same, an electromagnet in each of said locks for controlling the operation of said bolt operating means, an electric circuit for each of said magnets, parts of said circuit being adjacently 45 and remotely positioned as regards the lock, a switch qlocated in the remote portion of said circuit, an attack circuit having a relay, said switch being operable into one or the other of its positions by said attack circuit relay, a switch lo- 50 cated in the adjacent part of the circuit, said switches being related so that predetermined positions of each will condition the electromagnetic circuit to render said bolt operating means operative. f

l5. In a lock system, a series of locks, each of said locks having a bolt and a dog for preventing the retraction of said bolt, an electromagnet in each of said locks, said dog constituting the armature for said magnet, an electrical circuit 60 for said magnet, parts of said circuit being internally and externally located as regards the locks, a switch located in the external portion of said circuit, means whereby said switch is movable into one of its positions by an attack cir- 85 Cuit relay and is movable into an opposite position by a time controlled mechanism, a housing for said attack circuit relay and time controlled mechanism, a lock for said housing constituting one of said series of locks, a switch located in the internal part of said circuit, means for operating said switch, said internal and external switches being related so that each must be in a predetermined position to condition the 75 circuit oi the electromagnet to remove the bolt dog from dogging position.

16. In a lock system, a series of locks, each of said locks having a bolt and means for preventing the retraction of said bolt, an electro-magnet in each of said locks, said magnet Abeing operable to render said means inoperative, an electric circuit for said magnet, parts of said circuit being internally and externally positioned as regards the locks, a switch located in the external portion of said circuit, means whereby said switch is movable into one of its positions by an attack circuit relay and is movable into its other position by a time controlled mechanism, a housing for said attack circuit relay and time controlled mechanism, a lock for said housing constituting one of said series of locks, a switch in each of said locks for the internal portion oi said circuit, said internal and external switches being related so that predetermined positions of each will cause the lock magnet to render inoperative the means for preventing retraction of the bolt.

17. In a lock system,'a series of locking devices, electromagnets in each of said devices for governing the operation thereof, an electric circuit for each of said magnets, parts of said circuit being internally and externally positioned relatively to said devices, a switch located in the external portion of said circuit, means whereby said switch is actuable into one or the other of its positions by an attack circuit relay and a time controlled mechansm, a housing for said attack circuit relay and time controlled mechanism, a

lock for said housing constituting one of said se-4 electrical circuit for said magnet, part of said circuit being outside of the lock and a part being inside the lock, a switch located in the external portion of said circuit, an attack circuit relay, means whereby said switch is movable into open position by said attack circuit relay, said switch being movable into closed position by time controlled mechanism, a housing for said attack circuit relay and time controlled mechanism, a lock for said housing constituting one of said series of locks, a switch located in the internal part ,of the circuit, key operated means for moving said switch to closed position, said internal and external switches being relatedy so that both must be closed to actuate the lock magnet to remove the bolt dog from dogglng position.

19. In a lock system, a series of locks, electrical means for controlling the operation of said locks, means for controlling said electrical means, said means being centrally located and under the control of a lock, and means whereby said lock is time controlled to delay access to said control means. f

20. In a lock system, a series of locks, a main electrical circuit, branch circuits for each of said locks, ,said individual lock circuits being in parallel as regards said main circuit, a switch for each of said branch circuits for controlling each individual lock, a mam circuit switch, means i whereby said switch is operable in one direction to condition the main circuit to disable said locks, and operable in a reverse direction for rendering said locks operative, and means whereby said means i'or operating the switch in a reverse direction for rendering the lock operative is maintained vinaccessible by time controlled means to prevent surreptitious manipulation thereof.

21. In a lock system, an electrically operated lock having an electromagnet and a circuit therethrough, the condition of said circuit being controlling in the operation of the lock, an external circuit for particularly conditioning said rst circuit, means for restoring said ilrst circuit to its condition prevailing before its conditioning by 'said external circuit, and means whereby said means is maintained inaccessible by a lock under time control for delaying the restoration vof said circuit.

22. In a lock system, a series of locks, electrical means for controlling said locks, and for rendering the same effective to lock particular structures with which they cooperate, time controlled mechanism, and means supervised by said time controlled mechanism whereby said locks may be rendered ineffective to lock said structures, but only after a deiinite expiration oi time. f

23. In a lock system, a series of locks, electrical means for controlling said locks and for rendering the same eii'ective to lock the particular structures with which they cooperate, means operable to render said locks ineil'ective to lock said particular structures, and time mechanism for controlling the operation of said means.

24. In a lock system, a lock, an electrical lock control circuit through said lock, a central control means for said lock circuit, electrically operated means for actuating said central control means for said lock circuit in one direction for rendering said lock inoperable, and means for actuating said central control means in a reverse direction to render said lock operable, a lock under time control, said means being maintained inaccessible by said lock under 'time control.

2,5. In a lock system, a series of locks,mechan ical means normally operable .to release each of said locks, an electric circuit wired through each of said locks for controlling operation by said 4mechanical means, the condition oi' said circuit being adapted to control the operation of said lock, and a balanced circuit having means f or controlling the condition of said circuit.

26. In a lock system, a series of locking devices, means normally operable to release each-of said locking devices, electro-magnetic means` in each ci' said devices for controlling the operation thereof by said means, an electric circuit for said one of said series of locks.

28. In a lock system, a series oi' locks, an electric circuit for controlling the operation oi said locks, control means for said circuit operable by a reset mechanism and a balanced electrical circuit, means 'maintaining said reset mechanism inaccessible for manipulation controlled by a lock constituting one of said series of locks.

29. In a lock system, a series of locks, an electric control circuit for each of said locks, a central control means for said circuits, electrically operated means for actuating said central control means in one direction, and time controlled means for actuating said centralcontrol means in a reverse direction, and means whereby said central control means is maintained against manipulation by a lock constituting one of said series of locks.

30. In a lock system for a series of structures, a series of locking devices for said structures, an electromagnet in each of said locking devices for controlling the operation thereof and thereby control access to said structures, an electric circuit for said electromagnets having a central switch, an attack circuit, a relay in said attack circuit adapted to move said central switch into one of its positions in which said electric circuit for the electromagnets is conditioned whereby to cause said locking devices to lock up said structures, a housing for said switch, and a lock for said housing for preventing surreptitious resetting of said switch after it has been actuated by said attack circuit relay.

31. In a lock system for a structure, a lock for said structure, an electrical control circuit through said lock, means controlled by the condition of said circuit to render said lock effective or ineiective to lock said structure, a control cabinet, a control means in said control cabinet for conditioning said lock circuit, electrically operated means for actuating said control means in one direction whereby to condition said circuit to render said lock effective to lockv said structure, and a lock for said control cabinet for preventing access to said control means for operating said means in a reverse direction to oil'set the said electrically operated means.

32. In a lock system, a series of locks, each lock having a bolt and means for operating the same, an electromagnet in each of said locks for controlling the operation of said bolt operating means, an electric circuit for each of said magnets, parts of said circuit being adjacently and remotely positioned as regards the lock, a. switch located in the remote portion of said circuit, an attack circuit having a. relay, said switch being operable into one or the other of its positions by said attack circuit relay, a switch located in the adjacent part of the circuit, said switches being related so that predetermined positions of each will condition the electromagnetic circuit to render said bolt operating means operative.

33. In a lock system for a series of structures, a lock for each of said structures having a bolt, manually operated means for retracting said bolt, an electromagnetically controlled detent for preventing retraction of said bolt except when in release position, an electric circuit for said electromagnetically controlled detent and adapted when closed to excite the electromagnet to move said detent into a release position to permit retraction of said bolt by said manually operated means, a switch for said electric circuit, an attack circuit, a relay in said attack circuit for operating said switch whereby the proper conditioning of said attack circuit causes said relay to move said switch to open said electric circuit to prevent retraction of said bolts, a housing for said switch for preventing the closing of said circuit in opposition to said attack circuit operation, and a lock for said housing.

34. In a lock system for a series of structures, a lock for each of said structures, an electrical control circuit through each of said locks, means controlled by the condition of said circuit through each of said locks to render said locks eilective or ineffective to lock said structures, a central control cabinet, central means in said central control cabinet for conditioning said circuits to render said locks effective to lock said structures and to prevent access thereto, an electrical attack circuit for controlling said central means whereby a particular conditioning of said electrical attack circuit will actuate said central control means to condition said lock circuits to render said locks effective to lock said series of structures, and a lock for said central control cabinet for preventing access to said central control means for manual manipulation thereof in opposition to the operation of said electrical attack circuit.

35. In a lock system for a series of structures, a lock for each of said structures, operating means whereby each of said locks may be normally operated to permit access to said structures, an electrical control circuit through each of said locks, means controlled by the condition of said circuit in each of said locks to render said locks operative or inoperative by said operating means to permit or prevent access to said structures, a central control cabinet, central control means in said control cabinet for conditioning said control circuits to render said locks inoperative by said operating means and to prevent access to said structures, an electric attack circuit for actuating said central control means, means whereby a particular conditioning oi' said electrical attack circuit will actuate said central control means to condition said lock circuits to render said locks inoperative by said operating means, and a lock for said central control cabinet for preventing access to said central control means for manual manipulation thereof.

36. A lock embodying a bolt, means for retracting the bolt to effect bolt withdrawal from locking position, an armature and a solenoid for the armature for controlling said retracting means, a circuit for said solenoid, a first switch for said circuit for energizing the solenoid by closing said circuit whereby to render the bolt withdrawable, a second switch for controlling said circuit, a remote control for opening the second switch and thereby rendering the closing of said rst switch ineffective, and a locked housing for said second switch to prevent unauthorized operation thereof to oiset said remote control.

37. In a lock system, a series of locks, electrical means for controlling the operation of said locks, means for controlling said electrical means, said means being located in a central cabinet, a lock for said cabinet, said lock being one ot said series of controlled locks.

38. In a lock system, a lock, an electrical circuit for controlling the operation of said lock, means for controlling said circuit to render said lock operative to prevent access to a particular structure until said'circuit is re-established to its initial condition prior to operation of said means, means for re-establishing said circuit to its initial condition, a lock for preventing access to said circuit re-establishing means, and means whereby said lock is under time control.

39. In a lock system for a structure, a lock for preventing access to said structure, an electromagnet for controlling said lock, an electric cir- 75 cuit for said electromagnet, the electromagnet being operated to condition said lock to permit access to said structure when said circuit is closed, a switch for said circuit, an attack circuit, a relay in said attack circuit adapted to open the switch for said circuit of the electromagnet to prevent access to said structure when said attack circuit is properly conditioned, and a locked housing for said switch to prevent unauthorized operation thereof to offset the operation of said attack circuit.

40. In a lock system for a structure, a, locking mechanism for said structure, an electromagnet for said locking mechanism for controlling the operation thereof and thereby control access to said structure, an electric circuit for said electromagnet having a switch whereby it is opened and closed, an attack circuit conditioned by remote control means, means operable upon a particular conditioning of said attack circuit for moving said switch into a position in which said electric circuit for the electromagnet is opened whereby said locking mechanism prevents access to said structure, means for closing said switch to re-establish said circuit, a housing for said means, and a lock for said housing for preventing unauthorized closing of said switch after it has been opened by said attack circuit.

41. In a lock system for a structure, a..locking mechanism for said structure, an electromagnet for said locking mechanism for controlling the operation thereof and thereby control access to said structure, an electric circuit for said electromagnet having a predetermined portion thereof accessible for the opening and closing of said circuit, an attack circuit conditioned by remote control means, means operable upon a particular conditioning of said attack circuit for opening said circuit at the accessible portion thereof whereby the locking mechanism prevents access to said structure, a housing for saidaccessible portion of said circuit, and a lock for said housing for preyenting an unauthorized closing of said circuit 20 Lat said accessible portion after the circuit has been opened by operation of said attack circuit.

E. GOEHRING. 

